The cellular nature of parabolic louvers phiysically blocks the passage of light at angles above the sheilding angle. The specular aspect of the finish on the curved vertical surfaces reflect down at angles equal to or less than the sheilding angle. When these louvers are viewed a angles beyond that sheilding angle, they will have little of the brightness depends directly upon the percent of specular reflectance from the finish.

The advantage of Parabolic Louvers is the high degree of controlled light distribution that they offer. This precise light control makes Parabolic Louver ideal for areas with moderate to high concentrations of computer terminals (CRTs). This control is dependent upon the sheilding angle offered by the specific louver and degree of specularity of the finish. Parabolic Louver are the optimum choice for areas where visual comfort and controlled teflection off of vertial surfaces is critical.